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#include "coordinator.h"
#include "pthread.h"
#include "nanomsg/nn.h"
#include "nanomsg/survey.h"
#include "json-c/json.h"
#include <stdio.h>
#include <string.h>
#ifdef _WIN32
#define WIN32_MEAN_AND_LEAN
#include <Winsock2.h>
#else
#include <unistd.h>
#endif
#include "sleep.h"
#include "system.h"
static pthread_t coordinator_thread;
static int coordinator_sock;
static int coordinator_must_terminate = 0;
static void *coordinator_func( void *thread_data )
{
char *control = (char *)thread_data;
coordinator_sock = nn_socket( AF_SP, NN_RESPONDENT );
(void)nn_connect( coordinator_sock, control );
printf( "coordinator connected to %s\n", control );
sleep( 1 );
while( !coordinator_must_terminate ) {
printf( "coordinator idle: %d\n", coordinator_must_terminate );
sleep( 1 );
char *answer = NULL;
int bytes = nn_recv( coordinator_sock, &answer, NN_MSG, 0 );
if( bytes == ETIMEDOUT ) continue;
if( coordinator_must_terminate ) continue;
if( bytes >= 0 ) {
printf( "coordinator received: %s\n", answer );
nn_freemsg( answer );
json_object *obj = json_object_new_object( );
json_object *op = json_object_new_string( "register" );
json_object_object_add( obj, "op", op );
json_object *role = json_object_new_string( "coordinator" );
json_object_object_add( obj, "role", role );
char hostname[100];
gethostname( hostname, 100 );
json_object *host = json_object_new_string( hostname );
json_object_object_add( obj, "host", host );
unsigned int nofCpus = available_cpus( );
json_object *cpus = json_object_new_int( nofCpus );
json_object_object_add( obj, "cpus", cpus );
const char *msg = json_object_to_json_string( obj );
int msg_size = strlen( msg ) + 1;
printf( "coordinator send: %s\n", msg );
bytes = nn_send( coordinator_sock, msg, msg_size, 0 );
if( bytes < 0 ) {
if( errno == ETERM ) {
goto END;
} else {
fprintf( stderr, "ERROR: nn_send returned %d: %s (%d)\n",
bytes, nn_strerror( errno ), errno );
}
}
if( bytes != msg_size ) {
fprintf( stderr, "ERROR: truncated message!" );
}
json_object_put( obj );
}
if( bytes < 0 ) {
if( errno == EAGAIN || errno == EINTR ) {
continue;
} else {
fprintf( stderr, "ERROR: nn_recv returned %d: %s (%d)\n",
bytes, nn_strerror( errno ), errno );
}
}
}
END:
(void)nn_shutdown( coordinator_sock, 0 );
puts( "coordinator disconnected" );
return NULL;
}
int coordinator_init( const char *control )
{
pthread_attr_t attr;
int res;
coordinator_must_terminate = 0;
res = pthread_attr_init( &attr );
if( res != 0 ) {
return 1;
}
res = pthread_create( &coordinator_thread, &attr, coordinator_func, (void *)control );
if( res != 0 ) {
return 1;
}
return 0;
}
void coordinator_terminate( )
{
coordinator_must_terminate = 1;
nn_term( );
}
int coordinator_free( )
{
void *result;
int res;
res = pthread_join( coordinator_thread, &result );
if( res != 0 ) {
return 1;
}
return 0;
}
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